Whilst I was building it, it didn’t seem to boot up. For a day, I troubleshoot and couldn’t find the issue. Initially, I thought it was the power supply but it wasn’t. At first, I plugged the case power led, sound, hdd power leads into the wrong pins. I first corrected that then the second issue was the PCIe slot side pin was pushed down accidentally as it was installing an invisible graphics card. All resolved within 2 days.